I looked at the source code. Updating cflags seems straight forward. I even did upgrade of
the kamailio to latest. The behavior is the same with the upgraded -the cflags in userlocation are not getting updated. Also, the received column is not being set either.

Domain:: location table=512 records=1 max_slot=1
AOR:: p_krishna_test_com
Contact:: sip:p_krishna_test_com@75.62.17.45:55763;transport=tcp;ob Q=
Expires:: 23
Callid:: 2f34414ed33149cb9ec750d98f311525
Cseq:: 40154
User-agent:: QliqDesktop 1.0.0 (pjproject 1.10.0/win32)
State:: CS_SYNC
Flags:: 0
Cflag:: 0
Socket:: tcp:10.1.0.6:5060
Methods:: 8143
 

My kamailio version is nightly build from yesterday

$kamailio -V
version: kamailio 3.2.0-pre3 (x86_64/linux) 
flags: STATS: Off, USE_IPV6, USE_TCP, USE_TLS, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, DBG_QM_MALLOC, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 4MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: unknown 
compiled on 04:45:31 Oct  2 2011 with gcc 4.4.3


On Sat, Oct 1, 2011 at 6:21 PM, Krishna Kurapati <kkurapat@gmail.com> wrote:
Hi,

I am  hitting bit of a wall here. 

- I am setting bflags for NAT, and SIPPING before save("location") however, 
when I do "kamctl ul show", the Cflag is 0. 

I also checked see if the bflags are set or not in the register routine - they are being set. 

What am I missing?

snippets of the config files.

#!define FLB_NATB 6
#!define FLB_NATSIPPING 7
modparam("nathelper", "natping_interval", 30)
modparam("nathelper", "ping_nated_only", 1)
modparam("nathelper", "sipping_bflag", FLB_NATSIPPING)
modparam("nathelper", "sipping_method", "INFO")
modparam("nathelper", "sipping_from", "sip:pinger@50.62.1.7")

# params needed for NAT traversal in other modules
modparam("nathelper|registrar|usrloc", "received_avp", "$avp(RECEIVED)")
modparam("usrloc", "nat_bflag", FLB_NATB)

# Caller NAT detection route
route[NAT] {
#!ifdef WITH_NAT
        force_rport();
        if (nat_uac_test("19")) {
                if (method=="REGISTER") {
                        fix_nated_register();
                } else {
                        fix_nated_contact();
                }
                setflag(FLT_NATS);
                setbflag(FLB_NATB);
        }
#!endif
        return;
}

# Handle SIP registrations
route[REGISTRAR] {
        if (is_method("REGISTER"))
        {
                xlog("L_ALERT", "REGISTER: From $fU, $fd  To $tU, $td");
                if (isflagset(FLT_NATS) || isbflagset(FLB_NATB))
                {
                        setbflag(FLB_NATB); 
                        # uncomment next line to do SIP NAT pinging 
                        setbflag(FLB_NATSIPPING);  
                }
                # 7/28/11 - make sure only one contact location is active 
                # at any given time
                # unregister("location", "$rU");
                if (isbflagset(FLB_NATB))
                {
                        xlog("L_ALERT", "REGISTRAR: For $fU, $fd  FLB_NATB set");
                }

                if (isbflagset(FLB_NATSIPPING))
                {
                        xlog("L_ALERT", "REGISTRAR: For $fU, $fd  FLB_NATSIPPING set");
                }

                if (!save("location"))
                {
                        xlog("L_ALERT", "REGISTRAR: From $fU, $fd  Location could not be saved");
                        sl_reply_error();
                }

                exit;
        }
}

 
The debug log snippets
==================
Oct  1 15:58:30 siptest /usr/sbin/kamailio[19515]: ALERT: <script>: REGISTER: From p_krishna_test_com, 50.62.1.7  To p_krishna_test_com, 50.62.1.7
Oct  1 15:58:30 siptest /usr/sbin/kamailio[19515]: ALERT: <script>: REGISTRAR: For p_krishna_test_com, 50.62.1.7  FLB_NATB set
Oct  1 15:58:30 siptest /usr/sbin/kamailio[19515]: ALERT: <script>: REGISTRAR: For p_krishna_test_com, 50.62.1.7  FLB_NATSIPPING set
Oct  1 15:58:30 siptest /usr/sbin/kamailio[19515]: DEBUG: sl [sl.c:278]: reply in stateless mode (sl)

Output of kamctl command
====================
$ sudo kamctl ul show
Domain:: location table=512 records=1 max_slot=1
AOR:: p_krishna_test_com
Contact:: sip:p_krishna_test_com@75.62.17.45:50073;transport=tcp;ob Q=
Expires:: 287
Callid:: ad2d3a7bf39a4345861db1661576a7f3
Cseq:: 54856
User-agent:: QliqDesktop 1.0.0 (pjproject 1.10.0/win32)
State:: CS_NEW
Flags:: 0
Cflag:: 0                                                          <================= Cflag is not being set.
Socket:: tcp:10.1.0.6:5060
Methods:: 8143

Thanks
Krish Kura